Cant say,but the B1 is large,the 111 is about maybe twice the size of an F4 if that helps.
Also look at the cockpit area.The F111 was the only US aircraft that had an ejection capsule.The pilots sat side by side and the whole cockpit area was blasted frome the fuselage,and floated down like a space capsule.Had floatation bags for water landing,even the control stick could be used as a bilge pump.